Once you start applying you will possibly get fee waivers to schools, especially if you do as well as your think you will. You can also ask to have the application fee waived if they don't offer it on their own.

1) Yeah, don't assume your score. Leading upto my first LSAT I was consistently in the 170s for the last 2 months. My last 3 practices were 173,175,174. I got a 167 on the test.2) IF you score in the 170s on the real test, you will probably get a full ride or two to some top 25 schools.3)You can get loans assuming your credit isn't terrible.4) If you're going into public interest, many schools have loan forgiveness programs. These programs differ from school to school, so it's worth researching.

Definitely don't let lack of financial resources be an obstacle to your goal of pursuing a law school education! I suggest you contact the financial aid offices of the law schools in which you are interested right away and see what concrete steps they suggest you take. There are also lots of other scholarships available privately, start searching online and see what you can find. Prior to the actual law school admissions process, you should also try and study for the LSAT on your own. You can order the old tests online for a reasonable cost and if you do get above 175s on your practice exams, then you can probably forego the costs of a tutor or an LSAT test. Best of luck!